docs: def table_to_csv(table, engine, filepath, chunksize=1000, overwrite=False):
      """
      Export entire table to a csv file.
  
      :param table: :class:`sqlalchemy.Table` instance.
      :param engine: :class:`sqlalchemy.engine.base.Engine`.
      :param filepath: file path.
      :param chunksize: number of rows write to csv each time.
      :param overwrite: bool, if True, avoid to overite existing file.
  
      **中文文档**
  
      将整个表中的所有数据, 写入csv文件。
      """
      sql = select([table])
      sql_to_csv(sql, engine, filepath, chunksize)